I tryed to install sw 2008 sp4 on xp with sp3 and get thefollowing error:
error 1722 there is a problem with the windows installer package.Action Register_SA_sldwinshellextu.dll, location:c:\\windows\\system32\\, command: regsvr32 "C:\\programfiles\\solidworks shared\\sldwinshellextu.dll" /sSolidworksAdministration